| η | Magnifying Glass | Fresnel Corrector | Eyepiece’s length/m | ||
| Diameter/m | F-number | F-number | Rim feature size/μm | ||
| 0.01 | 25 | 100 | 1 | 1 | <9 |
| 0.02 | 25 | 100 | 2 | 2 | <3.3 |